Once the action potential is triggered, the depolarization (2) of the neuron activates sodium channels, allowing sodium ions to pass through the cell membrane into the cell, resulting in a net positive charge in the neuron relative to the extracellular fluid.
<h3>What is an action potential?</h3>
If the input from another neuron is strong enough, the neuron can relay the signal to neurons farther along the chain. Signals are normally transported between neurons by a chemical known as a neurotransmitter. Within a neuron, a signal is carried by an action potential, which is a momentary inversion of the resting membrane potential (from the dendrite to the axon terminal).
<h3>Where does action potential occur?</h3>
An action potential occurs when information is transferred from a neuron's cell body and down an axon. Neuroscientists also refer to the action potential as a "spike" or a "impulse." The action potential, a surge of electrical activity, is brought on by a depolarizing current.
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